/* ============================================================
   library.css — the Library panel (components/library.html)
   Imported by app.css, so it is in every page's <head> ahead of
   responsive.css. Uses the app.css tokens only.

   The panel slides in from the sidebar's edge (inline-start, so
   the right edge in Arabic). Surfaces are opaque: a see-through
   panel over a busy chat is what made the old modals hard to read.
   ============================================================ */

.lib-overlay {
  position: fixed; inset: 0;
  z-index: 1300;                 /* above settings (1000) and the mobile drawer (1200) */
}
.lib-overlay[hidden] { display: none; }

.lib-backdrop {
  position: absolute; inset: 0;
  background: var(--scrim);
  backdrop-filter: var(--scrim-blur); -webkit-backdrop-filter: var(--scrim-blur);
  opacity: 0; transition: opacity var(--t);
}

.lib-panel {
  position: absolute; top: 0; bottom: 0; inset-inline-start: 0;
  width: min(440px, 100vw);
  display: flex; flex-direction: column;
  background: var(--glass-panel-solid);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border-inline-end: 1px solid var(--glass-line);
  box-shadow: var(--glass-highlight), var(--glass-shadow);
  transform: translateX(calc(-100% * var(--dir, 1)));
  transition: transform var(--t-slow);
  outline: none;
}
.lib-overlay.is-open .lib-backdrop { opacity: 1; }
.lib-overlay.is-open .lib-panel    { transform: none; }
@media (prefers-reduced-motion: reduce) {
  .lib-backdrop, .lib-panel { transition: none; }
}
body.lib-open { overflow: hidden; }

/* ── Head ───────────────────────────────────────────────── */
.lib-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3); height: 52px; padding: 0 var(--sp-3) 0 var(--sp-4);
  border-bottom: 1px solid var(--glass-line); flex-shrink: 0;
}
.lib-head-title { display: flex; align-items: center; gap: var(--sp-2); color: var(--brand-light); }
.lib-head-title h2 {
  font-family: var(--font-ui); font-size: 15px; font-weight: 600;
  color: var(--text-primary); letter-spacing: -0.01em;
}

.lib-icon-btn {
  width: 32px; height: 32px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--r-sm); border: 1px solid transparent;
  color: var(--text-secondary);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.lib-icon-btn:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }
.lib-icon-btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 1px; }
.lib-icon-btn.lib-danger:hover { background: var(--danger-dim); color: var(--danger); }

/* ── Tabs ───────────────────────────────────────────────── */
.lib-tabs {
  display: flex; gap: 4px; padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--glass-line); flex-shrink: 0;
}
.lib-tab {
  flex: 1; min-width: 0;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 7px 10px; border-radius: var(--r-sm);
  border: 1px solid transparent;
  font-size: 13px; font-weight: 500; color: var(--text-tertiary);
  white-space: nowrap;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.lib-tab span { overflow: hidden; text-overflow: ellipsis; }
.lib-tab:hover { background: rgba(255,255,255,0.04); color: var(--text-primary); }
.lib-tab.is-active {
  background: var(--brand-dim); border-color: var(--brand-rim); color: var(--brand-light);
}
.lib-tab:focus-visible { outline: 2px solid var(--brand); outline-offset: 1px; }

/* ── Panes ──────────────────────────────────────────────── */
.lib-pane {
  flex: 1; min-height: 0; overflow-y: auto;
  padding: var(--sp-3);
  scrollbar-width: thin; scrollbar-color: rgba(24,128,192,0.2) transparent;
}
.lib-pane[hidden] { display: none; }
.lib-pane:focus-visible { outline: none; }

.lib-note {
  padding: var(--sp-8) var(--sp-4); text-align: center;
  font-size: 13px; line-height: 1.6; color: var(--text-tertiary);
}
.lib-loading { display: flex; justify-content: center; padding: var(--sp-8) 0; }
.lib-spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid rgba(24,128,192,0.18); border-top-color: var(--brand);
  animation: lib-spin 0.75s linear infinite;
}
@keyframes lib-spin { to { transform: rotate(360deg); } }
.lib-sr {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* Segmented control — "This chat / All images" */
.lib-segment {
  display: flex; gap: 2px; padding: 3px; margin-bottom: var(--sp-3);
  background: rgba(255,255,255,0.03); border: 1px solid var(--glass-line); border-radius: var(--r-sm);
}
.lib-segment-btn {
  flex: 1; padding: 6px 8px; border-radius: 6px;
  font-size: 12px; font-weight: 500; color: var(--text-tertiary);
  transition: background var(--t-fast), color var(--t-fast);
}
.lib-segment-btn:hover { color: var(--text-primary); }
.lib-segment-btn.is-active { background: var(--glass-tint-3); color: var(--text-primary); box-shadow: var(--glass-highlight); }

/* ── Image grid ─────────────────────────────────────────── */
.lib-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: var(--sp-2);
}
.lib-tile {
  position: relative; aspect-ratio: 1; overflow: hidden;
  border-radius: var(--r-md); border: 1px solid var(--glass-line);
  background: linear-gradient(105deg, rgba(148,163,184,0.06) 25%, rgba(148,163,184,0.14) 50%, rgba(148,163,184,0.06) 75%);
  background-size: 200%;
  animation: shimmer 1.8s ease-in-out infinite;
  transition: border-color var(--t-fast), transform var(--t-fast);
}
.lib-tile.is-loaded, .lib-tile.is-broken { animation: none; background: var(--glass-tint-2); }
.lib-tile img { width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity var(--t); }
.lib-tile.is-loaded img { opacity: 1; }
.lib-tile:hover { border-color: var(--brand); transform: translateY(-1px); }
.lib-tile:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.lib-tile-overlay {
  position: absolute; inset: auto 0 0 0; padding: 18px 8px 7px;
  display: flex; flex-direction: column; gap: 2px; text-align: start;
  background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
  opacity: 0; transition: opacity var(--t-fast);
}
.lib-tile:hover .lib-tile-overlay, .lib-tile:focus-visible .lib-tile-overlay { opacity: 1; }
.lib-tile-prompt {
  font-size: 11px; line-height: 1.35; color: #f1f5f9;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.lib-tile-time { font-size: 10px; color: #cbd5e1; }
@keyframes shimmer { 0% { background-position: 200%; } 100% { background-position: -200%; } }

/* ── Rows (documents, archived chats) ───────────────────── */
.lib-list { display: flex; flex-direction: column; gap: 2px; }
.lib-row {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: 8px 8px 8px 10px; border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.lib-row:hover, .lib-row:focus-within { background: var(--glass-tint-2); border-color: var(--glass-line); }
.lib-row-main {
  flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px;
  text-align: start; padding: 2px 0; border-radius: 6px;
}
button.lib-row-main:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
button.lib-row-main:hover .lib-row-title { color: var(--brand-light); }
.lib-row-title {
  font-size: 13.5px; font-weight: 500; color: var(--text-primary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
/* dir="auto" keeps each title's own reading order; alignment follows the UI. */
.lib-row-title { text-align: left; }
[dir="rtl"] .lib-row-title { text-align: right; }
.lib-row-meta { font-size: 12px; color: var(--text-tertiary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lib-row-meta.is-error { color: var(--danger); }
.lib-row-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

.lib-doc-icon {
  width: 34px; height: 34px; flex-shrink: 0; border-radius: var(--r-sm);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-ui); font-size: 10px; font-weight: 800; letter-spacing: 0.03em;
}
.lib-doc-icon--pdf  { background: rgba(244,63,94,0.12); color: #fb7185; }
.lib-doc-icon--doc  { background: rgba(59,130,246,0.14); color: #60a5fa; }
.lib-doc-icon--xls  { background: rgba(34,197,94,0.12);  color: #4ade80; }
.lib-doc-icon--file { background: rgba(255,255,255,0.06); color: var(--text-secondary); }

/* Buttons */
.lib-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border-radius: var(--r-sm);
  border: 1px solid #334155; background: rgba(255,255,255,0.03);
  font-size: 13px; font-weight: 500; color: var(--text-primary); white-space: nowrap;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.lib-btn:hover { background: rgba(255,255,255,0.07); border-color: #475569; }
.lib-btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 1px; }
.lib-btn:disabled { opacity: 0.5; cursor: default; }
.lib-btn-sm { padding: 5px 10px; font-size: 12px; }
.lib-btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.lib-btn-primary:hover { background: var(--brand-light); border-color: var(--brand-light); }
.lib-btn[hidden] { display: none; }
.lib-btn-danger { color: #fda4af; border-color: rgba(244,63,94,0.35); }
.lib-btn-danger:hover { background: var(--danger-dim); border-color: var(--danger); color: #fecdd3; }

.lib-bar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3);
  padding: 0 2px var(--sp-3);
}
.lib-bar-count { font-size: 12.5px; color: var(--text-secondary); }
.lib-foot { display: flex; justify-content: flex-end; padding-top: var(--sp-4); }

/* ── Document detail (over the list) ────────────────────── */
.lib-detail {
  position: absolute; inset: 52px 0 0 0;    /* below the head */
  display: flex; flex-direction: column; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4) var(--sp-4);
  background: var(--glass-panel-solid);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}
.lib-detail[hidden] { display: none; }
.lib-detail-head { display: flex; align-items: center; gap: var(--sp-2); }
.lib-detail-title {
  flex: 1; min-width: 0; font-size: 14px; font-weight: 600; color: var(--text-primary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.lib-detail-meta { font-size: 12px; color: var(--text-tertiary); padding-inline-start: 40px; }
.lib-detail-meta:empty { display: none; }
.lib-detail-logs {
  display: flex; flex-direction: column; gap: 3px;
  padding: 8px 10px; border: 1px solid var(--glass-line); border-radius: var(--r-sm);
  background: rgba(255,255,255,0.02);
  font-family: var(--font-mono); font-size: 11.5px; max-height: 120px; overflow-y: auto;
}
.lib-detail-logs:empty { display: none; }
.lib-log { display: flex; align-items: baseline; gap: 8px; color: var(--text-secondary); }
.lib-log-stage { font-weight: 600; min-width: 96px; }
.lib-log--success .lib-log-stage { color: var(--success); }
.lib-log--failed  .lib-log-stage { color: var(--danger); }
.lib-log-msg { flex: 1; }
.lib-log-dur { color: var(--text-tertiary); white-space: nowrap; }
.lib-detail-body {
  flex: 1; min-height: 0; overflow-y: auto;
  padding: var(--sp-3); border: 1px solid var(--glass-line); border-radius: var(--r-md);
  background: var(--glass-field);
}
.lib-doc-text {
  white-space: pre-wrap; word-break: break-word;
  font-family: var(--font-sans); font-size: 13.5px; line-height: 1.7; color: #cbd5e1;
}

/* ── Image viewer ───────────────────────────────────────── */
.lib-lightbox {
  position: fixed; inset: 0; z-index: 1310;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--sp-4); padding: var(--sp-10) var(--sp-4) var(--sp-6);
  background: rgba(2, 6, 12, 0.94);
}
.lib-lightbox[hidden] { display: none; }
.lib-lightbox-close { position: absolute; top: var(--sp-3); inset-inline-end: var(--sp-3); color: #e2e8f0; }
.lib-lightbox-figure {
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-3);
  max-width: min(960px, 100%); min-height: 0;
}
.lib-lightbox-figure img {
  max-width: 100%; max-height: 72vh; object-fit: contain;
  border-radius: var(--r-md); box-shadow: var(--shadow-lg);
}
.lib-lightbox-figure figcaption {
  max-width: 640px; text-align: center; font-size: 13px; line-height: 1.55; color: #cbd5e1;
}
.lib-lightbox-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--sp-2); }

/* ── Small screens: the panel takes the screen ──────────── */
@media (max-width: 640px) {
  .lib-panel { width: 100vw; border-inline-end: none; }
  .lib-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
  .lib-row-actions .lib-btn-sm { padding: 5px 8px; }
}